There are 2 repositories under microcode topic.
An Interactive Hex-Rays Microcode Explorer
Microcode Updates for the USENIX 2017 paper: Reverse Engineering x86 Processor Microcode
A custom ELF linker/loader for installing ET_REL binary patches at runtime
KL10 model B (KL10-PV) PDP-10 CPU emulation through execution of the original microcode
Define custom assembly-like instructions and use them to write programs which are transpiled into synthesisable Verilog code.
https://hackaday.io/project/172073-microcoding-for-fpgas
InsydeBIOS Microcode Update Tool **系微BIOS微码更新工具,。经过测试,适用于AMI BIOS
Utilities for microcode stuff (auto-bin2dat.bat, auto-bin2dat.sh, bin2dat.c, cpuid.c)
a goofy 8 bit cpu
Patched rEFInd. See what's different in the wiki.
Emulator for custom computer architecture
NO WARRANTY. CLI Updater tool for Intel CPU microcode in BIOSes
This is a microcode editor for Baffa-1 HomebrewCPU Minicomputer
Intel, AMD, VIA & Freescale Microcode Extraction Tool
Plugin that tries to find and disassembly vu microcode in ps2 executable.
tool-initramfs-extract
Signed / unsigned multiplier / divider used by a microcode-driven prime number generator
Intel, AMD, VIA & Freescale CPU Microcode Repositories